6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

A Multihop Cooperative Routing Algorithm for Minimzing the Number of Hops in Spectrum Sharing Networks

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2011.245838,
        author={I-Te Lin and Iwao Sasase},
        title={A Multihop Cooperative Routing Algorithm for Minimzing the Number of Hops in Spectrum Sharing Networks},
        proceedings={6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={5},
        keywords={cooperative routing QoS spectrum sharing minimization of the number of hops},
        doi={10.4108/icst.crowncom.2011.245838}
    }
    
  • I-Te Lin
    Iwao Sasase
    Year: 2012
    A Multihop Cooperative Routing Algorithm for Minimzing the Number of Hops in Spectrum Sharing Networks
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2011.245838
I-Te Lin1,*, Iwao Sasase1
  • 1: Keio University
*Contact email: itlin@sasase.ics.keio.ac.jp

Abstract

We propose a multihop cooperative routing (MCR) algorithm that extends the lengths of the $x$ axis projections of the hop distances and finds the multihop route that minimizes the number of hops in spectrum sharing networks. The cognitive relay and the cognitive receiver of each hop except the last one are selected by the following procedures. First, the cognitive node that is nearest away from the cognitive sender is selected as the cognitive relay, and let the cognitive destination (CD) be the cognitive receiver. Then, if the participation of the selected cognitive relay can not satisfy the QoS requirement of the cognitive transmission, among the cognitive receiver candidates that satisfy the QoS requirement of the cognitive transmission, the one whose $x$ coordinate has the largest difference from that of the cognitive relay is selected as the cognitive receiver. At the last hop, if the cognitive relay is available, the cooperative transmission is performed. Otherwise, the direct transmission is performed. Simulation results show that the MCR reduces the average number of hops compared to the FNR and outperforms the FNR in terms of the average end-to-end reliability, the average end-to-end throughput, and the average required transmission power.